The Empty Box and Zeroth Maria, Vol. 2 (light novel) (The Empty Box and Zeroth Maria, 2)

The Empty Box and Zeroth Maria, Vol. 2 (light novel) (Volume 2) (The Empty Box and Zeroth Maria, 2)

The Empty Box and Zeroth Maria, Vol. 7 (light novel) (Volume 7) (The Empty Box and Zeroth Maria, 7)

The Empty Box and Zeroth Maria, Vol. 6 (light novel) (Volume 6) (The Empty Box and Zeroth Maria, 6)